# include "curses.ext" /* @(#) erase.c: 1.1 10/15/83 (1.2 4/7/82) */ /* * This routine erases everything on the _window. * * 1/27/81 (Berkeley) @(#)erase.c 1.2 */ werase(win) reg WINDOW *win; { reg int y; reg chtype *sp, *end, *start, *maxx; reg int minx; # ifdef DEBUG if(outf) fprintf(outf, "WERASE(%0.2o), _maxx %d\n", win, win->_maxx); # endif for (y = 0; y < win->_maxy; y++) { minx = _NOCHANGE; maxx = NULL; start = win->_y[y]; end = &start[win->_maxx]; for (sp = start; sp < end; sp++) { #ifdef DEBUG if (y == 23) if(outf) fprintf(outf, "sp %x, *sp %c %o\n", sp, *sp, *sp); #endif if (*sp != ' ') { maxx = sp; if (minx == _NOCHANGE) minx = sp - start; *sp = ' '; } } if (minx != _NOCHANGE) { if (win->_firstch[y] > minx || win->_firstch[y] == _NOCHANGE) win->_firstch[y] = minx; if (win->_lastch[y] < maxx - win->_y[y]) win->_lastch[y] = maxx - win->_y[y]; } # ifdef DEBUG if(outf) fprintf(outf, "WERASE: minx %d maxx %d _firstch[%d] %d, start %x, end %x\n", minx, maxx ? maxx-start : NULL, y, win->_firstch[y], start, end); # endif } win->_curx = win->_cury = 0; }